Where is the low side ac port on a 2002 f150?

On a 2002 Ford F-150, the low side AC port is typically located on the accumulator, which is situated on the passenger side of the engine bay, near the firewall. It is a smaller port compared to the high side port and is usually connected to a larger diameter aluminum line. Look for a service port with a plastic cap that is often marked with an "L" for low side.